Elastic tire for vehicle-wheels.



No. 870,323. PATENTED Nov. 5, 1907.

G. E. N. 1. B. SUBRA.

ELASTIC TIRE FOR VEHICLE WHEELS.

APPLIOATION FILED MAR.18.1907.

2 SHEETSSHEBT 1.

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G. E. N. I. B. SUBRA. ELASTIC TIRE FOB. VEHICLE WHEELS.

APPLICATION FILED MAR-18.1907.

2 SHEETS-SHEET 2.

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UMTE' S A ATENT OFFICE 'GUSTAVE EMILE NOE ISIDORE ERNEST SUBRA, OF PARIS, FRANCE;

nnas'rro ma non VEHICLE-WHEELS;

Specification of Letters Patent. 1

Patented Nov. 5, 1907.

Application filed March 18, Ills 07. Serial No. 862,842;

To all whom it may concern; I

Be itlmown that I, GUSTAVE EMILE nus Ismonn Ennns'r Susan, a citizen of the Republic of France, and resident at Paris, France, have invented anew and nseiul Elastic Tire forVohicle-Vlmeels, which elastic .tire is fully set forth in the following specification.

tread blocks to the blades constituting springs. Fig. 4

shows a method of mounting the elastic elements on the rim." Fig. 5 illustrates a modified construction.

0n the wooden'rim b secured to the s okes a, is mounted a metal rim 0 (Fig. 1). On the said rim 0 are arranged springs r similar to carriage springs and constitilted by superposed blades. Each group touches the adjoining ones in such manner that the different groups of spring blades form a continuous surface all round the rim n, no one of the groups is connected to its that it retains its own resiliency and can my to the adjoining groups. number of superposed blades constituting each group of Bil rings a may be any desired, and will depend on the resiliency to be obtained and on the weight ofthc vehicle.

For fitting up-the various groups on the metal rim 0,

the proceeding is as,follows One of the ends of the spring blades is bent at r sons to engage with the pro- The other end of sting portion 0' of the metal rim. the same springs is annealed and straightened at 1 as shown in Fig. 1. At the moment of fitting, the annealed portion 1' is beaten down by a'hammer against the projecting portion 0 of the metal rim, and in this way each group of springs is connected to the metal rim in such a manner that the springs can play without leavthe rim.

This device has moreover the advantage of enabling one group of springs to be easily replaced on the road in case it breaks, or is damaged. As will be readily understood, it will be sufiicient to replace a group of springs to straighten the end 1 and to disengage then the bent end a".

' Each group of springs is secured to a tread block which can be made of any'suitable material; rubber, wood, copper, cast steel, etc. i

The solidan'ty between a group of springs and the tread block is obtained by means of a part shown in Fig. 3. The bent portions engages with the springs 1', and the widened portion 0 with flange 6 serves to hold the tread block. As the bentportion e increases cessed, as shown in Fig. 2, at f, in order that, as already stated, the different blades of each group should exactly touch'tlie blades of the adjoining groups.

It'is evident that instead of having tread blocks incould be secured to a single tread band extending throughout the whole circumference of the wheel. By means of this arrangement, a tire is obtained comprisof them preservingall its resiliency and being able to bend while its neighbors remain inoperative.

A stop d secured to the metal rim 0, limits the bend ing of the springs r in case of violent shocks. The above described arrangement, however, is not very well. adapted when applied to so called heavy vehicles. U I

, Fig. 4 showsa device enabling the series of. elastic said elements. having arrived at the last stage of their manufacture, that is to say, secured at-both their ends. This method of fitting is just as applicable to tires for any other vehicles with traction.

The springer taken separately, are bent-at both their ends to the desired shape, then tempered a'ndprovided with the tread-,block. I Then the suitably rounded-off animal, mechanical, and other tend around the wheel rim are. introduced into the ends of each of the springs r constructed as described On the other hand, the metal rim of the cross-section already described, is provided with recesses made in its flanges and corresponding to the width of the parts s. The parts 3 are of such cross-section that they occupy the outer peripheral channel of the rim at the same time as they engage with the recesses of the. flanges. 'They are secured in that position by means of bolts t passing through the metal rim 0 and the wooden rim 6. The flanges s s of the parts 8 being in line with the extension of the flanges of the metal rim, this method of fitting does not present'any drawbacks as regards longitudinal strains acting on the elastic elements.

Whatever be the method of fitting adopted, whether that shown in 1 or that shown in Fig. 4, to each elastic element may be added a second spring u, Fig. 5, which is secured to the bracket e, and of which the freeends u u at a certain degree of bending of the spring r can come against stops 1) '0 arranged in the peripheral channeliof the member s. In this way, for a light or medium load oi the vehicle, the springs r of the elastic elements act alone; U the load is increased, the bending of the springs 1' increases, and the springs u, coming to rest against, the stops!) '0, add their resiliency to that of the springs r'.

the thickness of the spring blades r, the latter are redependent of each other, the various groups of springs ing elastic elements independent of each other, each elements to be applied to the-rim, the springs of the flanges s s of a member made up of sections which exthe wheels of heavy weight vehicles, as for Wheels of I Having thus described my invention I claim as new and desire to secure by Letters Patent,

1, -An elastic tire for vehicle wheels connected to the wheel rim comprising a steel rim mounted on said wheel rim and having curved portions beyond same, steel springs composed each of a number of curved blades onsaid metal rim, having bent up portions conforming in shape to. the curved portions of the metal rim and recesses in their middle portion, a tread invconnection with said springs, an intermediate device connecting the springs and said tread having a hollow portion surrounding the recessed portion of the spring and anextended portion adapted to receive and support the tread, and a stop block located Within the peripheral channel of the metal rim.

2, An elastic tire for vehicle wheels connected to the wheel rim comprising a steel rim bent outwardly at its portion surrounding the recessed portion of the spring and an extended portion adapted to receive and support the tread, and a stop block located within the peripheral channel of the metal rim.

3. An elastic tire for vehicle wheels connected to the wheel rim comprising a steel rim bent outwardly at its ends, strengthening members below said rim in conformity thereto, securing-bolts passing through the wheel rim said metal rim and said members, curved bent end portions formed on-each member, steel springs composed each of a number of curved blades one on each member, having bent up portions conforming, in shape to the curved portions of the metal rim and recesses in their middle portion,- a tread in connection with said springs, an intermediate de' vice connecting the springs and said tread having a hollow portion surrounding the recessed portion of the spring and an extended portion adapted to receive and support the'tread, a second-elastic steel spring secured inside of the first steel spring, and three stop blocks in the peripheral channel of the inner strengthening member.

In testimony whereof I have signed this specification in the presence of two subscribing witnesses.

GUSTAVE EMILE NOE ISIDORE ERNEST SUBRA.

Witnesses:

EMILE Lnoran'r, DEAN B..MASON. 

